Light projector



- J. T. RoFl-Yl LIGHT PROJECTOR Filed Nov. 17. 192g v/IV VEN? 0R ffm www Y Fatt .lively 22, 192@o TATES F ICE.

P AT E. N T. Oi

' CORPORATION, A CORPORATION OF W'EST VIRGINIA.

LIGHT PROJECTOR.

Application led November 17, 1920. Serial No, 424,641.

To all whom it may concern:

Be itknown that I, JosErH T. ROFFY, a citizen of the Republic of Hungary, and a resident of Pittsburgh, in the county of Al- V legheny and State of Pennsylvania, have made a new and useful Improvement in Light Projectors, of which the following is a specification.

This invention relates to illuminating apparatus and more especially to headlights and spot lights for use on vehicles.

An object of this invention is to provide a light projector comprising a glass moldblown optical unit and a housing or casing for properly supporting the same.

A still further object 'of this invention is to provide a light projecting device having a. minimum number of parts and having such arts of cheap construction and easy 2o assem lage.

To clearly illustrate the invention, I have shown an embodiment thereof in the draw- "ing accompanying and forming part of this application and in which the single figure 245 represents a sectional elevation of a light projecting'device embodying this invention.

n The optical unit 1 consists of reflector por- 4 tions 2 and 3 an annular connecting portion 4 and an aperture closing or front glass 5. This is mo1dblown as an integral structure and the reflecting portions 2 and 3 are preferably externally silvered, as shown by the heavy lines 2a and 3a. For the conveniencey of manufacture, the connecting portion 4 is also externally silvered as shown at 4.

It will be understood that the reector l portions, if desired, maybe internally silvexed, and while this method may increase the initial efficiency of the device, it is preferable, to use the external silvering as this "may be protected by a protective cover of f suitable paint, asl is now common in mirror manufacture.`

The term silvering is used in itsbroad sense and contemplates any mirrorI surface formed by any of the metals nowused, such as old, silver, nickel, etc.

n order to protect and properly house the optical unit which of necessity is somewhat fragile and to form a support for the electric incandescent lamp used as the li ht source, a metal housing or case, Ipreferably formed of two steel stampings 8 and 9 is used. These stampings, as will be under- 55 may be of any contour desired but comprising a reflector portion and a forthe back of stamping 8 will preferably be so formed as to engage the peripheral edge 10 of the optical unit. The front stamping 9 preferably overlaps the forward edge of stamping 8, as shown at 1l and its forward edge 12 whicliwill have more or less spring, yieldingly holds the unit in position within the housing in such a manner that the silvered surfaces are out of contact with the housing Stamping 8 is provided with a flanged opening, (the iiange being numbered 13) and a block 14 snugly fits within said flange, and is held. in place by means of a set screw 15. Y

Block 14 is provided with a central bore 16 adapted to receive la lampy socket 17 of standard construction. v An electric incandescent lamp 18 of suitable type and candle power, is employed as the source of. illumination4 and socket 17, carrying the lamp may be moved axially lto allow the filament 19 of the lamp to be placed in proper focal relation to the optical system. The set screw l5 serves as a lock for socket 17 .y

While I have shown a standard form of switch 20, it will be understood that any type of'switch may be used.`

The tip 21 of the lamp bulb with this optical system is preferably frosted, as is the case with the lamp bulb of my Patent No. 1,245,512.

In alight projector, a blown glass unit 9o wardly bulging portion serving'as a cover and joining said reflector portion at the point of the units greatest circumference, a shell or casing comprising a rear portion spaced from the reflector portion ofthe glass unit except at its greatest circumference where the shell or casing is provided with a seat against which the glass unit rests and an `annular casing closing member overlapping the front portion of the shell or casing and extending forwardly of the casing unit. andout of contact therewith to a point where the circumferencel of the glass unit is materially lessthan its greatest-circumference. i

In testimony whereof, I have hereunto subscribed my name this 15th day of November, i920. l v.

lJos-Era` fr.y RoFFY. 

